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The 100 percent is not the Charge of the Batteries but the monitor is telling you that they are being charged. You must disconnect the truck to see the charge of the battery. A better way to tell the charge is by a battery tester .. remove the caps and test the charge of electrolyte.. 10.5 Volts is a DEAD battery.. A battery is fully charged at 12.8 volts and essentially dead at 12 volts...
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